Apparatus for molding building-blocks.



I V. FISHER.

APPARATUS ron MOLDING BUILDING sums.

Patented Dee. 11,191?

APPLICATION FILED APR. 2. 191?- LWWVMQW 2 SHEETS-SHEET 1. F) di H MW:

I J glwuamfo'c Witness N N J. v. HS HER. APPARA TUSFOR MOLDING BUILDING BLOCKS.

APPLICATION FILED APR. 2. I91]. Lfifi fifiu 2 SHEETS-SHEET 2.

Patented Dec. 11,, 1917.

llhlllThllll S JUHN -i7.

FISHER, Ult'" PL'YIlittll'JlElil, l ttltliitllliiditlln l ll lldlili Application filed April 2, 1917.

To all whom it may concern."

Be itlrnown that T, JOHN l Fisrnun, a citizen of the United States, residing at Plymouth, in the county of lVayne and State of lllichigan, have invented certain new and useful ltmprovements in Apparatus tor ltlolding Building-Blocks; and l do hereby declare the following to he a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, rel"- erence being had to the accompanying drawings, and to the letters and figures of retorence marked thereon, which form a part t this specification.

This invention relates to new and useful improvements in apparatus for molding huilding blocks.

The main object of the invention is the production ot a block mold having sectional or demountable walls and a collapsible core having means tor decreasing the diametrical entent of the core to permit its ready removal from the material within the confines ol the walls of the mold.

rlnother object ol the invention is to provide a device of this character which will mold simultaneously a multiplicity of hloclrs. Another object of the invention is to construct a device of this character in which the bricks or blocks may he removed without displacing or moving the molded hloclrso lln the accompanying drawings which are made a part of this application,

ltigure 1 illustrates a side elevation, partly in section, of a mold constructed in accord ance with my invention.

l ig. 2 is a plan view.

l ig. 8 is a horizontal sectional view of the enpansihle core used in connection with the mold.

l 'ig. lis an enlarged detail sectional view thereot, and Fig. 5 is an end view oi the mold, partly in section.

lltel'erence now being had to the details oil the drawings hy numerals, 5 designates a tlat car on which it have shown my mold, the numeral l8 indicating the base or hottom thereon. The mold hase it comprises a numher cl independent sections 7, having downwardly extending flanges 8 forming supports tor the respective lease elements whereby they are supported above the surltace oi the car 5. The lease sections 7 have at their adjacent laces cut out portions torm- Specification of Letters Ira-tent.

latented Wee, ll, 1917.,

Serial. no. waste.

ing grooves 9 to receive the edges of the transverse partition walls 10, and support the same in an upright position while the molding operation is taking place.

The side walls ol the mold comprise plates 11 havin suitable apertures 12 for the reception of the collapsible core, to he hereinafter more specifically described. The side walls or plates 11, as well as the transverse partition walls and longitudinal partition walls 13, are belted together at their points of engagement in any suitable man ner and to insure the side walls and partitions against lateral displacement, an upper ring Li and lower ring 15 are provided. These rings it and 1 5 entirely encircle the upper and lower portions ot the finished mold, the upper ring ll heing holted thereto, while the lower ring is tree from permanent connection with the mold elements to permit the mold and its partitions to he removed by a vertical lift thereot, without displacing or moving the molded hloclrs.

Tn the alining openings of the partitions 13 and side plates ll, the eirpansihle cores, shown more particularly in Figs. 3 and l, are positioned, the cores comprising curved end sections 16 and curved side sections l'l, the sections 16 having pins 19 which entend through slots 20 of the sections ill and provide an adjustable connection hetween the sections 16 and 1'? to permit enpansion and contraction of one element with the other,

llolted to the sections ltl as at 23 are the irons 21 which are curved to conform. to the contour ot the sections 16, and these irons 21 have parallel errtensions 2% which are apertured to receive trunnions Ql on which the outer ends of the respective linlrs 25 are pivoted, the inner ends 26 thereott heing pivotally supported on the trunnions 52'? which are also pivotally connected to side plates 28, which in turn are connected to the operating rod 29 positioned centrally ot the core hy means ot holts 80.

The operating rod, 939', is preterahly square in cross section, therehy providing suhstantially flatside faces 3ft, which are engaged by the flat laces 3% ot the linlrs 25, when the core is moved to its enpandcd position, therehy limiting the expansion oil the same and preventing the linlrs trom heing moved past a predetermined point, which would result in the collapsing ot the core.

The faces 33, which are opposite the laces are curved to allow a swinging movement of the links 25 in one direction, which movement being necessary to permit the contraction of the core during the removal thereof from the mold proper. One end of the operating rod 29 is provided With an opening or eye 34 to which may be applied any suitable power'neeessar'y to accomplish the contraction and expansion of the core.

In the operation of my device, the side walls and partitions are set up, as shown in Fig. 1, the cores positioned in the alining openings thereof, and expanded to closely engage the same. The plastic material is then poured in the mold and allowed to set and, after a predetermined period, the cores are contracted and removed with the result that continuous central ventilating openings are present in the finished blocks. The mold and blocks are then separated by merely moving the mold vertically with the result that the upper part of the mold leaves the finished blocks on the base sections, the blocks now being ready for use.

Copies of this patent may be obtained for five cents each, 10y addressing the Commissioner of Patents What I claim to be new is In combination, in a mold, an expansible said projections of the irons, plates and trun- 1).,

nions carried thereby upon which latter the inner ends of said links are pivoted, and an operating bar having pivotal connection with said plates.

In testimony whereof I hereunto aiiix my signature in presence of two witnesses.

JOHN V. FISHER.

Vitnesses MILTON E. lVIsnLnY, E. K. BENNETT.

Washington, D. 0. 

